Car truck



June 5, 1945. R. L. EDGAR CAR TRUCK Filed Oct. 5, 1944 9 Sheets-Sheet 1 314mm ROBERT GAR R. L. EDGAR June 5, 1945.

CAR TRUCK Filed Oct; 5, 1944 9 Sheets-Sheet 2 IWII L I 1 June 5, 1 945. i v R. EDGAR Y I 2,377,768

CAR TRUCK Filed Oct. 5, 1944 9 Sheets-Sheet 3 ROBERT EJ AR R. L. EDGAR 7 CAR TRUCK June 5, 1945.

Filed Oct. 5, 1944 9 Sheets-Sheet 4 June 5, 1945. R. 1. EDGAR CAR TRUCK Filed Oct. 5, 1944 9 Sheets-Sheet 5 R. L. EDGAR June 5, 1945.

CAR TRUCK Filed Oct. 5, 1944 9 Sheets-Sheet 6 fiur l l l 9 Sheets-Sheet 7 June 5, 1945. R. EDGAR CAR TRUCK Filed Oct. 5, 1944 Q N0 Ml M 0Q June .5, 1945. R. L. EDGAR 2,377,763

CAR TRUCK v Filed Oct. 5, 1944 9 Sheets-Sheet 8 4 a: L I In.

june 5, 1945. R EDGAR I 2,377,76

' CAR TRUCK I Filed Oct. 5, 1944 9 Sheets-Sheet 9 Patented June 5, 1945 2.377.163 can TRUCK Robert L. Edgar, Barnesville, lhio, assignor to The Watt Car & Wheel Company, Barnesville, Ohio, a corporation of Ohio Application October 5, 1944, Serial No. 557,259

14 Claims.

My invention relates to improvements in car trucks and has to do, more particularly, with the construction and mounting of wheel-carrying trucks for a mine car. This application is a continuation-in-part of my pending application for Car trucks, Serial No. 525,679, filed March 9, 1944.

The principal object of my invention is to provide' an improved car truck construction for an eight-wheel car, which will be simple and economical to manufacture, and sturdy and durable in use.

A further object of my invention is to provide a mounting for the wheels of an eight-wheel car, in which the car will be resiliently supported from truck frames that swivel about vertical'axes, and can also rock about horizontal axes as required by inequalities in the tracks.

Another object .of my invention is to provide a. wheeled truck assembly, which can be readily taken apart for repair or replacement of parts, but which wili not be accidentally disassembled, in case the car should be derailed or overturned.

Further objects, and objects relating to details of construction and economies of operation, will definitely appear from the detailed description to follow. My invention is clearly defined and pointed out in the appended claims. Structures, constituting preferred embodiments of my invention, are illustrated in the accompaning drawings, forming a part of this specification, in

which I Fig. 1 is a bottom-plan view. of a mine car embodying my invention. b Fig. 2 is a view of the car in side elevation.

Fig. 3 is a vertical, sectional view, taken on the line 3-3 of Fig 1.

Fig. 4 is a vertical, sectional view, taken on the line 4-5 of Fig. 1.

Fig. 5 is a vertical, sectional view, taken on the line 5-5 of Fig. 4.

Fig. 6 is a horizontal, sectional view, taken on the line 6 -6 of Fig. 4.

Fig. '7 is a horizontal, sectional view, taken on Fig. 8 is a detail, sectional view, line 8-8' of Fig. 5. Fig.-9is a detail view, in side elevation, of

certain parts shown in Figs. 2 and 3.

taken on the Fig. 10 is a view, in side elevation, of the lower center bearing member.

Fig. 13 is a view of the saddle in end elevation.

Fig. 14 is afragmentary, sectional view of the buffer and draft gear.

Fig. 15 is a vertical, sectional view, taken on the line I5i5 of Fig. 14.

Fig. 16 is a bottom plan view of a mine car embodying a modified form of my invention.

Fig. 1'7 is a view of the car shown inFig. 16, in side elevation.

Fig. 18 is a vertical, sectional view, taken on the line l8i8 of Fig. 16.

Fig. 19 is a vertical, sectional view, taken on the linei9-l9 of Fig. 18.

Fig. 20 is a horizontal, sectional view, taken on the line 20-20 of Fig. 18.

Fig. 21 is a horizontal, sectional view, taken on the line 2I-2i of Fig. 18.

Fig. 22 is a view, in side elevation, of the lower cemter bearing member 'used in the modified form of my invention.

Fig. 23 is a, viewof said member, in end elevation.

Fig. 24 is a top plan view of one of the tie 5 bars and the universal connections between the truck frames and the ends thereof, employed in connection with the modified form of my invention.

Fig. 25 is a section, taken on the line 25-45 of Fig. 24, and

Fig. 26 is a perspective view of one of the swivel blocks, forming a part of the universal connections 'for the tie bar employed in the modified form of my invention. Q

In the drawings, the same reference numerals refer to the same parts throughout the several views, and the sectional views are taken looking in the direction of the arrows at the ends of the section lines.

In general, the car truck assembly of my. invention, of which there will be four, in the ease of an eight-wheel car, located under the four mounted upon said hinge bolt and held against lateral movement with respect to the truck Fig. 11 is a view of said member, in endelevation.

Fig. 12 is a view, in side elevation, of the spring saddle.

frame, a member revolubly mounted so as to ing through said flanges so as to prevent relative fore and aft movement, and springs interstrain, nut 31 posed between the member and the spring saddle. This member, which swivels about a vertical axis, may be a lower center bearing member, which cooperates with an upper center bearing member secured to the car bpttom. The spring saddle may consist of a member having its central portion arched over the truck hinge bolt, and having a retaining member secured thereto and passing beneath the bolt. The

flanges depending from said lower center bearing member may have notches therein, which receive the truck hinge bolt, and these notches may to the top surface thereof, along the longitudinal centerline thereof. Angles l3 are secured to the bottom sheet, adjacent the ends of the number 2; and have upwardly extending legs. Riser plates ll are secured to the angles 3, and to the front and rear edges of the bottom sheets 0, and extend upwardly where they are secured to the end lading bottoms l5, which, as shown, lie in a horizontal plane considerably above that of the central bottom ID. The car structure includes the side plates l8, extending from one end of the car to the other, and the plates l1 secured to the lower central portions of plates I8 and to the edges of thebottom plate I. Plates l8 are stiflened by the ribs l8 and the longitudinally extending belt rails 20. The car body is completed by the end member 2|, Fig. 1.

A buffer and draft gear is moimted at each end of the car, in line with the stiffening member [2. Each bufier and draft gear comprises a pair of spaced draft members 22, the upper flanges of which are secured to the end lading bottom l5. Said draft members are flared outwardly at'23, and the outer ends are turned laterally at 24, and secured to the end structure of the car. A plate 25 is secured to the bottom flanges of said angles. A bolt 26 is pivotally connected, at 21, to the shank 28 of a coupler head 29. This bolt 28 extends through followers 30 and 3 I, which are formed as shown in slidably mounted on the plat 25 between the members 22. Stops 32 are secured to the inner faces of the members 22 and limit the movement of follower 30, in one direction, while stops 33 secured to the inner faces of said members limit the movement of the follower 3|, in the other direction. Anutfl, the bolt 26, engages the follower 2|, and a spring 85, which may be of double construction as shown, as interposed-between the followers 38 and Si. When this buffer and draft gear is under bufliing force, the end of shank 28 engages follower 30 and moves it toward follower 3|, against the pressure of spring 38, follower 3| being held against movement by stops 88. When the gear is under draf engaging follower 3| moves ittoward follower 85, follower 30 being held against movement by stops 82, It is to be noted that the buffing and draft strains are transmitted to draft members 22, which aresecured to the end lading bottom adjacent the portion of the car structure that is stlfl'ened by the longitudinal stiflener l2.

screwed on the threaded end. of

88 against the pressure of spring The car is supported by four truck assemblies symmetrically arranged beneath the four corners of the car. Since each of these truck assemblies is the same, but one will be described. A plate 88 is secured to the lower surface of the end lading bottom l5, as by the rivets 18. This plate has a central opening 11 therein, and a downwardly extending flange 18 surrounding said opening. As shown, this flange may be made separate from the plate 38 and integrally secured thereto. as by welding. The plate 36, together with the flange 18, constitutes an upper center bearing member, which is flxed to the bottom l5 of the car. Revolubly mounted upon this upper center bearing member, so as to swivel about a vertical axis, is a lower center bearing member 88, which has an upwardly extending flange 8| of such dimensions as to flt within the flange 18 and the opening ll of the upper center bearing member. As shown, the flange 8| may be made separately from the lower center bearing member 80, and integrally secured thereto, as by welding.' Flange 8| forms a cup or chamber upon the upper surface of the lower center bearing member, which is intended to be fllled with grease for the lubrication of the bearing, and

flange 8| is provided with holes 82 therethrough, near the upper surface of the lower center bearing member 80, so that grease may have access to to the bearing surfaces to lubricate the same.

An annular flange 83 is welded to the top surface of lower center bearing member 80, and spaced slightly from the outside of the upper center bearing flange 18. Another annular flange 84 is welded to the lower surface of plate 88 and depends therefrom, outside of the upper portion of flange 83, being spaced slightly therefrom. These'two flanges, 83 and 84, serve as a means for retaining the lubricating grease in the cup or chamber formed by the flange 8|, when the car is .turned upside down in the rotary dump, and

', they also serve as a means for preventing dirt from getting access to the bearing surfaces.

It will be seen that the lower center bearing member 88 is permitted to swivel about a vertical axis, but the broad bearing surfaces provided by flanges 18 and 8| prevent any substantial tilting of the lower-center bearing with respect to the upper. The lower center bearing member 88 has secured thereto, as by welding, and depending therefrom arranged Ioreand aft, 8, pair of sleeves 49, which project downwardly therefrom and form spring guides. It also has a pair of dependlag side flanges 58, each of which has a notch II formed therein, the lower end of which is open.

,These depending flanges Mare thickened and stiffened by members 85, which are welded thereto and have notches 86 identical in form with the notches 5|.

The truck frame comprises a pair of side mem. bers 52 and 53, which are ueldiy connected by the cross members 54 to 1302.1: arigid truck frame. Axles 55- are mounted fore and aft therein and the car wheels 58 are iournaled on said axles between the side members or said frame. A truck hinge bolt 5'! extends horizontally through the side members of the truck frame centrally thereof, and has a head 58 engaging the outside of side member 53 and a nut 59 screwed on the other end thereof and engaging the outside of truck frame side member 52. The side members 52 and 88 are so spaced thatthe flanges 58 of the lower center bearing member 88 are slidably engaged therewith, to prevent lateral movement of the truck frame with respect to said lower center bearing member. The truck hinge bolt Fl is located in the notches BI and 88 or said flanges E and stiifening members 85, and thereby displacement of the truck frame, fore and aft with respect to the I lower centerbearing member 80, is prevented.

' spacer between these two flanges, stifiening the entire structure. The flanges 59 are thus in slidable engagement with the edges of saddle 69, and the side members 52 and 53 of the truckframe.

Sleeves 62 are secured to the upper face of sad-1 die 69, fore and aft thereof, and project upwardlyforming spring guides for the lower ends of springs 63, which are interposed between saddle 69 and the lower center bearing member 89, being guided by the sleeves 62 and 49 at the lower and upper ends thereof, respectively. A bar 64 is. welded or otherwise secured to the lower surface of the saddle 60 and'passes beneath the truck hinge bolt 51, thus maintainingwthe saddle in pivotal relation with said bolt.

Each of the side flanges 50 has downwardly projecting portions '85, at the sides of the notches eitlting the car on the tracks after it has been dera ed. 7

As shown in Fig. l, the swiveling truck frames, at the same. end ofthe car, are interconnected by means of tie bars to maintain, in general, their parallelism, while permittingsuch slight tipping of the truck frames from the vertical as may be required in'rounding curves or by inequalities of the-track. A pair of brackets 96 are secured to the upper surface of each lower center bearing member 80, at diametrically opposite points thereof, the body portion of each bracket being spaced 5t, and there are passages 66 ext nding transversely of said portions, through which a pin 81 is passed. One end of this pin is bent at right angles, as at 88 (Fig. 8), and, after the pin has been inserted, the other end is bent laterally, as at 89, so as to hold the pin in position. This pin spans the lower end of the notch 5| and closes it. It prevents thetruck hinge bolt 51, and the truck frame, from dropping completely away from the lower center'bearing member, incase the car should be derailed or overturned.

When. the car is in normal use. with the wheels 56 restingon the railsindicated at 136 in Figs. 2 and 4, the car .body will rest upon and be supported by the lower center bearing members 80. which, in turn,-are resiliently supported from the truck frames by the springs 63. Under these conditions, the weight of the'car and its lading will hold the upper and lower center bearing members against separation, but it is desirable to pro vide means for preventing the entireseparation v of the lower center bearing member from'the laterally from the outer sides thereof and solocated as to be in line with the brackets 99. A bolt 92, having a head 93, is passed through openings in the bracket 9| and the corresponding base of the U-shaped bracket 90, and held in place by a nut 94 screwed on'theupper end of the bolt and engaging the upper surface of the base of bracket 90. These bolts 92, engaging brackets '90 and 9|, thus limit the vertical movement of.- the lower per center bearing member, so that the lower member cannot drop away completely-from the upper member, in case the car-should be derailed or overturned. Upon the outer side of each of thetruck frame sidemembers 52 and 53, there is welded a laterally extending str p 95, which is bent into the curved or arcuate shape shown in Fig. 2. These pieces are added to aid miners in from the upper surface of the bearing member 90 and the "brackets being integrally secured thereto, as byweldin'g. One of these brackets is arranged fore, and the other aft, of the vertical axis about which the lower center bearing member swivels, and the corresponding brackets, on the lower center bearing members at the same end of the car, are connected by tie bars 97 and 98, respectively. The ends of the tie bars 91 and 98 extend-between the upper face of. the lower center bearing member 89 and the body port on of the bracket 96, and arepivotaily connected thereto by -a headed pin 99, extending through openings in'the bracket 95, the end of the-ire bar, and the lower center bearing member, and being held in place by a cotter pin I99. As shown in Fig. 3, the tie bar 91, which is nearest the end ofthe car, is bent downwardly at I Ill and extends beneath the draft members 22, while the tie bar 99, which is remote from-the end of the car, extends through suitable openings 102' provided in the draft members 22, as indicated in Fig. 1. The axes of the pivotal connections between the tie bars and the lower center bearing member lie in a vertical plane, which includes the axis about whichthe lower center bearing member swivels and the mid-points of. the tread surfaces of the corresponding wheels I56. Angle brackets I 93 may be provided, to limit the swiveling movements of the truck frames.

The car wheels 56, of course, run upon the trackrails that are indicated at 16, in Figs. 2 and 4. These support the truck frames and the latter,

in turn, support thetruck hinge bolts 51, upon which the spring saddles 69 are pivotally mounted. Each lower center bearing member 80, having its flanges 59 engaging the innersides of the side members 52 and 53 of the truck frame,

and the inner sides of said flanges engaging the edges of the spring saddle 5B, lateral movement of said bearing member with respect to the truck frame is prevented; Since the truck hinge bolt 51 engages in the slots- 5! of said flanges, movement of the lower bearing member 99, fore and aft with respect to the truck frame, is also prevented. and said bearing members and, therefore, the car bottom are resiliently supported from the spring saddles and the truck frames by means of the spring 63, while said lower bearing members and the truck frames are permittedto swivel minecar of the eight-wheel type. substantially center bearing member with respect to the .up-

' tion-impart.

the preferred form of my invention, the car is 1 supported by four truck assemblies symmetrically arranged beneath the four corners of the car. Each of these truck assemblies includes a plate 36, that is secured to the lower surface of the end lading bottom l5. This plate has a hole 38 therein, which receives the head 39 of a king pin 40 that depends vertically therefrom. This king pin extends through a central opening in an upper center bearing member 4|, which isattached to the car bottom and plate 36 by means of rivets 42, and which is coaxial with the king pin and engagesthe lower surface of the head 39. This upper center bearing member has an annular, downwardly proiecting'flange 43. Revolubly mounted on the king pin 40 is a lower center bearing member 44, which has an annular flange 46 surrounding the central opening, through which the king pin passes, and a spaced annular flange 41. The annular groove, formed by these flanges 46 and 41, receives the annular flange 43 on the upper center bearing member 4|. The lower member 44 may be stiflened by suitable ribs 45. A nut 48, screwed on the threaded lower end of the king pin 40, engages the lower surface of the lower center bearing member -and holds it from vertical displacement with respect to the upper bearing member and the car bottom, while permitting it to swivel about a vertical axis. Member 44 ha secured thereto, fore and aft, a pair of sleeves 49, which project downwardly therefrom and form spring guides. The lower center bearing member 44 also has a pair of depending side flanges 50, each of which has a notch 5| formed therein, the lower end of which is open.

Each truck assembly includes a truck formed of the truck frame'side members 52 and I3. and

the cross members 54, in which the wheels 56 are journaled, fore and aft, on the axles 55, as inthe preferred form of my invention. Each truck ,frame carries a horizontally-extending truck hinge bolt 51, on which the spring saddle 60 is pivotally mounted, being retained thereon by the member 84, welded to the lower surface of the the side me"-*ber is of the truck frame, there are secured brackets 68, at the top and bottom. Each of these brackets has an opening therein and a swivel block 10, provided with trunnions 69 at the upper and lower ends thereof, is journaled between each pair of brackets, said trunnions projecting into the openings in the brackets. Eachswivel. block has a slot II formed therein, and holes 12 extending through the block at right angles to the slot. The swivel blocks at the same ends of the truck frames are connected by a tie bar 13, having the ends thereof flattened as at 14, and projecting into the slots 'II of the corresponding swivel blocks. These tie bars 13 are pivotally connected about horizontal axes with the swivel blocks by means of the bolts 15, which extend through the holes 12 and through holes inthe flattened ends I4 of the tie bar. The blocks 10 swivel about vertical axes, and the tie bars are pivotally connected to the blocks about horizontal axes, so that the tie bars are universally connected at their ends to the truck frames at the same end of the car. Thus, while these the bars maintain the truck frames in general parallelism, they permit some slight tipping of them from the vertical, as may be required in rounding curves or because of inequalities in the tracks.

I am aware that the constructions shown in this application may be varied considerably, without departing from the spirit of my invention and, therefore, I have claimed my invention broadly as indicated by the appended claims.

Having thus described my invention, what I claim as new Patent, is:

1. In a car construction, the combination of a car bottom, an upper center bearing member secured to the car bottom, a lower center bearing and desire to secure by Letters member engaging said upper member and revoluspring saddle and extending beneath the truck hinge bolt, as has already been described in connection with the preferred form of my invention. lower center bearing member 44 and the spring. saddle 60, being supported and guided by sleeves 49 and 62. as has already been described. In this form of my invention, the lower end of each notch Si is closed by a bolt 61, extending throughopenings 66 in the downwardly rojecting portions 65 0: the side flange 50, and passing beneath the truck hinge bolt. These bolts 61 prevent the truck frame from dropping entirely away from;

the lower center bearing member, when the car is derailed, and, because of the nut 48 on thelower end of the king pin 51, which prevents separation of the lower center bearing member 44 from the upper center bearing. member 4|, the truck frame cannot fall away from the'upper center bearing member. Because of this,- it is unnecessary to provide brackets 90 and BI, and bolts 92, for the purpose of preventing separation of the truck frame from the upper center bearingmember, as in the tion.

As shown in Fig. 16, the swiveled truck frames,

at the same end of the car, are interconnected by means of tie bars so as to maintain, in general, their parallelism, while permitting some oslight tipping of the truck frames-from the vertical, as may be required in rounding curves or the inequalities of the tracks. At each and of preferred form of my inven- Springs 63 are interposed between the 0 car bottom, an upper center bearing member seble thereon about a vertical axis, said lower memher having a pair of depending side flanges, a truck frame slidably engaging said flanges, axles mounted fore and aft in said frame, wheels mounted on'said axles, a truck hinge bolt carried by said truck frame centrally thereof and passing through said flanges, a spring saddle pivotally mountedon said truck hinge bolt between said flanges and with its edges in engagement there-. with, and a pair of springs interposed between said lower member and said saddle.

2. In a car construction, the combination of a car bottom, an upper center bearing member secured to the car bottom, a lower center bearing member engaging said upper member and revoluble thereon about a vertical axis, said lower member having a pair of depending side flanges, a truck-frame comprising rigidly connected side members slidably engagin said flanges, axles mounted in said frame fore and aft, wheels mounted on said axles between said side members, a truck hinge bolt carried by said truck frame centrally thereof and passing through said flanges, a spring saddle pivotally mounted on said truckhinge bolt between said flanges and with its edges in engagement therewith, and a pair of springs interposed between said lower member and said saddle.

3. In a car construction, the combination of a cured thereto, a lower center bearing member revoluble with respectto said upper bearing member about a vertical axis, said lower member having a. pair or depending side flanges each provided with a centrally located notch, a truck as'rigvee frame comprising a pair of rigidly connected side members slldably engaging said flanges, axles mounted in said frame fore and aft, car wheels mounted on said axles between the said side members, a truck hinge bolt carried by said truclr frame centrally thereof and passing through said notches, a spring saddle pivotally mounted on said truck hinge bolt between said flanges and with its edges in engagement therewith, and a pair of springs interposed between said lower. center bearing member and said spring flanges, axles mounted ,in said frame fore and aft, wheels mounted on said axles between said side members, a truck hinge bolt carried by said truck frame centrally thereof and passing through said notches, a spring saddle having a central portion arched over said bolt and mounted between said flanges with its edges in engagement therewith, a retaining member securedto said saddle and passing beneath said bolt, and

a pair of springs interposed between said lower bearing member and said saddle.

5. In a car construction, the combination of a car .bottom, an upper center bearing member secured to the car bottom, a lower center bearing member engaging said upper member and revoluble thereon about a vertical axis, said lower memher having a pair of spring guides projecting downwardly from the lower surface thereof and arranged fore and aft and a pair of depending side flanges each provided with a centrall lo-- 'cated notch, a truck frame comprising a pair of 7. In a car construction, the combination of a car bottom, an upper center bearing member rigidly secured to said car bottom and having a downwardly extending annular'bearing flange, a lower center bearing member engaging the lower surface of said annular bearing flange andhav= ing an upwardly extending annular flange revo 'lubly" received within the annular bearing flange of the upper member, said lower bearing member and the annular flange thereof forming with the car bottom a chamber for'the reception of lubricant, and said last-mentioned flange having lubricating passages therein for the passage of lubricant from said chamber to the bearing surfaces of upper and lower center bearing members, said lower member having a pair of depending side flanges, a truck frame slidably engaging said flanges, axles mounted fore and aft in said frame, wheels mounted on said axles, a truck hinge bolt carried by said truck frame centrally thereof and passing through said flanges, a spring saddle pivotally mounted on said truck hinge bolt between said flanges and with its edges in engagement therewith, and a ,pair of springs interposed between said lower member and said saddle. l

8. In a car construction, the combination of a car bottom, an upper center bearing member rigidly secured to said car bottom and having a. downwardly extending annular bearing flange, a lower c'enter bearing ember engaging the lower surface of said annular bearing flange and having an upwardly extending annular flange revolubly received within said first-mentioned flange, said lower center bearing member and the annular flange thereof forming a chamber for the reception of lubricant, and said last- ,mentioned flange being provided with lubricating openings therethrough, an upwardly extending annular flange secured to said lower center hearing. member and surrounding the annular flange of the upper member, said lower member having rigidly connected side members slidably engaging said flanges, axles mounted in said frame fore and aft, wheels mounted on said axles between said side members, a truck hinge bolt carried by said truck frame centrally thereof and passing through said notches, a spring saddle having a central portion arched over said bolt and a pair of spring guides fore and aft projecting upwardly therefrom, said saddle being mounted between said flanges with its edges in engagement therewith, a retaining member secured to said saddle and passing beneath said bolt, and a pair of springs centered by said sprin guides and interposed between said lower member and said saddle.

6. In a car construction, the combination of aan annular flange extending upwardly therefromand revolubly received within the annular bearing flange ofthe upper member, said lower mem-..

her having a pair of depending side flanges, a truck frame slidably engaging said flanges, axles mounted fore and aft in said frame: wheels mounted on said axles, a truck hinge bolt carried by said truck frame centrally thereof and passing through said flanges, a spring saddle pivotally mounted on said truck hinge bolt between said flanges and with its edges in engage- ,gnent therewith, and a pair of springs interposed between said lower member and said a pair of depending side flanges, a truck frame slidably engaging said flanges, axles mounted fore and aft in said frame, wheels mounted on said axles. a truck hinge bolt carried by said truck frame centrally thereof and passing through said flanges, a spring saddle pivotally mounted on said truck hinge bolt between said flanges and with its edges in engagement therewith, and a pair of springs interposed between said lower member and said saddle.

9. Ina car construction, the combination of a 'car bottom, an upper center bearing member rigidly secured thereto and having a downwardly extending annular bearing flange, a lower center bearing member engaging the lower surface of rigidly secured to the lower center bearing mam-= her and surrounding the annular bearing flange of the upper member, a downwardly extending annular flange rigidly secured to said upper member; and surrounding said last-mentioned flange, said lower member having a pair of depending side flanges, a truck frame slidably engaging said flanges, axles mounted fore and aft in said frame, wheels mounted on said axles, a truck-hinge bolt carried by said truck frame ccntrally thereof and passing through said flanges,

a spring saddle pivotally mounted on said truck hinge bolt between said flanges and with its edges in engagement therewith, and-a pair of springs interposed between said lower member and said saddle. v

10. In a car construction, the combination of a car bottom, an upper center bearing member secured to the car bottom, a lower center bearing member engaging said upper member and revoluble thereon about a vertical axis, said lower member having a pair of depending side flanges,

. a truck frame slidably engaging said flanges,

ter bearingmember.

11. In a car construction, the combination of a car bottom, a king pin mounted thereon and depending vertically therefrom, a member revolubly mounted on said king pin but held from vertical movement relative to the car bottom, said member having a pair of depending side flanges, a truck frame slidably engaging said flanges, axles mounted fore and aft in said frame, wheels mounted on said axles, a truck hingle bolt carried by said truck frame centrally thereof and passing through said flanges, a spring saddle pivotally mounted on said truck hinge bolt between said flanges and with its edges in engagement therewith, and a pair of springs interposed between 'said member and said saddle.

12. In a car construction, the combination of a car bottom, a king pin mounted thereon and depending vertically thereirom, a member revolubly mounted on said king pin but held from vertical movement relative to the car bottom, said member having =a-pair of depending side flanges each providfd with a centrallyslocated notch, a truck framfp mprising apaiikofi-i'igidly connected side members slidably engagifigsaid' flanges, axles :"mouiitd in' said frameitfore and aft, wheels mounted 'on said axles' betjwe'en said side mem- 13. In a car construction, the combination of a car bottom, a king pin mounted thereon and dea ber having a pair of spring guides projecting downwardly from the lower surface thereof and arranged fore and aft and a pair of depending side flanges each provided with a centrally located notch, a truck frame comprising a pair of rigidly connected side members slidably engaging said flanges, axles mounted in said frame fore and aft, wheels mounted on. said axles between said side members, a truck hinge bolt carried by said truck frame centrally thereof and passing through said notches, a spring saddle having a central portion arched over said bolt and a pair of spring guides fore and aft projecting upwardly therefrom, said saddle -being mounted between said flanges with its edges in engagement therewith, a retaining member secured to said saddle and passing beneath said bolt, a pair of springs centered by said spring guides interposed between said first-mentioned member and said saddle, and pins secured to said side flanges and spanning the lower ends of the notches therein.

' 14. In a car construction, the combination of a car bottom, an upper center bearing member secured thereto, a king pin extending through said member coaxially thereof and depending from the car bottom, a lower center bearing member mounted on said king pin and revoluble with respect to said upper bearing member, means for retaining a said .lower member against vertical movement with respect to the upper member, said lower member having a pair of spring guides projecting downwardly from the lower surface thereofand arranged fore and aft and a pair of depending side flanges each provided with a centrally located-notch, a truck frame comprising a pair of rigidly connected side members slidab y engaging said flanges, axles mounted in said frame fore and aft, car wheels mounted on said here, a truckhinge bolt carried bysaid truck frame centrally thereof-and passing through said notches, a spring saddle having a central portion arched over said bolt and mounted between said flanges with its edges in engagement therewith" retaining member secured to said saddle and pass ing beneath said bolt,-and a pair of springs inte'r posed between said member and said saddle.

axles between the said side members, a truck hinge bolt carried by said truck frame centrally thereof and passing through said notches, a spring saddle having a central portion arched oversaid bolt and a pair of spring guides fore and aft projecting upwardly therefrom, said saddle being mounted between said flanges with its edges in engagement therewith, a retaining member secured tozsaid'saddle and passing be- ,neath said bolt, 2. pair of springs centered by said spring guides and interposed between said lower center bearing member and said" spring saddle, and pins secured to said side flanges and spanning the lower ends of the notches therein.

ROBERT L. 

